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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane Del Pino
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: SyntaxHighLighter.cpp,v 1.2 2005/11/27 21:44:12 delpinux Exp $
#include <SyntaxHighLighter.hpp>
#include <QtGui/QTextDocument>
#include <QtGui/QTextLayout>
SyntaxHighLighter::
SyntaxHighLighter(QObject *parent)
: QObject(parent)
{
;
}
SyntaxHighLighter::
~SyntaxHighLighter()
{
;
}
void SyntaxHighLighter::
addToDocument(QTextDocument *doc)
{
connect(doc, SIGNAL(contentsChange(int, int, int)),
this, SLOT(highlight(int, int, int)));
}
void SyntaxHighLighter::
addMapping(const QString &pattern,
const QTextCharFormat &format)
{
__mappings[pattern] = format;
}
void SyntaxHighLighter::
highlight(int position, int removed, int added)
{
QTextDocument *doc = qobject_cast<QTextDocument *>(sender());
QTextBlock block = doc->findBlock(position);
if (!block.isValid())
return;
QTextBlock endBlock;
if (added > removed)
endBlock = doc->findBlock(position + added);
else
endBlock = block;
while (block.isValid() && !(endBlock < block)) {
highlightBlock(block);
block = block.next();
}
}
void SyntaxHighLighter::
highlightBlock(QTextBlock block)
{
QTextLayout *layout = block.layout();
const QString text = block.text();
QList<QTextLayout::FormatRange> overrides;
foreach (QString pattern, __mappings.keys()) {
QRegExp expression(pattern);
int i = text.indexOf(expression);
while (i >= 0) {
QTextLayout::FormatRange range;
range.start = i;
range.length = expression.matchedLength();
range.format = __mappings[pattern];
range.format.setFontFamily("Courier New");
range.format.setFontPointSize(10);
overrides << range;
i = text.indexOf(expression, i + expression.matchedLength());
}
}
layout->setAdditionalFormats(overrides);
const_cast<QTextDocument *>(block.document())->markContentsDirty(block.position(), block.length());
}
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